U-Bolt

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U-Bolt

U-bolts are U-shaped threaded fasteners designed to secure pipes, tubes, or round objects to support structures. They consist of a curved section with threaded ends, used in conjunction with nuts and washers to provide stable clamping. U-bolts are widely used in piping systems where vibration resistance, load support, and secure positioning are required.

They are essential in applications involving pipe supports, structural attachments, and mechanical installations, especially in demanding industrial environments.

Types of U-Bolts
  • Round Bend U-Bolt: For pipes and circular sections
  • Square Bend U-Bolt: For square or rectangular supports
  • Semi-Round U-Bolt: For specialized clamping requirements
  • Long Tangent U-Bolt: Extended legs for deeper mounting
  • U-Bolt with Plate (U-Clamp): Includes saddle plate for uniform load distribution

Applicable Codes & Standards

Dimensional Standards:
  • DIN 3570 – U-bolts for pipe supports
  • ASME B18.31.5 (where applicable)
  • MSS SP-58 / SP-69 – Pipe hangers and supports
Material Standards:
  • ASTM A36 – Carbon steel
  • ASTM A193 (B7 / B7M) – Alloy steel for high strength
  • ASTM A320 (L7 / L7M) – Low temperature service
  • Stainless Steel (AISI 304 / 316 equivalent to ASTM A193 B8 / B8M)
Material Grades (Commonly Used)

High Tensile, Stainless Steel, Alloy Steel, Inconel, Incoloy, Hastelloy, Monel, Silicon Bronze, Phosphor Bronze, Aluminium Bronze, Nickel, Brass, Copper, Copper Nickel,Duplex, Super Duplex, Titanium Alloys, CB20, Nitronic, Nimonic, ASME, ASTM etc…

Typical Specifications
  • Diameter Range: M6 to M100 / ¼” to 4”
  • Pipe Size Compatibility:As per OD of pipe
  • Thread Type: UNC / UNF / Metric
  • Leg Length: Custom as per installation requirement
  • Manufacturing Process: Hot forming / cold bending with thread rolling
Surface Protection / Coating:
  • PTFE Coated (Blue, Yellow, Red, Green & Black)
  • Hot Dip Galvanized
  • Yellow Zinc Plated or Cadmium Plated
  • Blue Zinc Plated
  • Molykote
  • Aluminium Zinc Flake Coated
  • Black Phosphate
  • Zinc Plated
  • Nickel Plated
Engineering Applications
  • Pipe supports and pipe racks
  • Oil & Gas and petrochemical plants
  • HVAC systems
  • Marine and offshore structures
  • Structural and mechanical installations
Performance Characteristics
  • Strong and uniform clamping force
  • Resistance to vibration and movement
  • Easy installation and adjustment
  • Suitable for high-load and corrosive environments
  • Customizable for project-specific requirements
Key Design Considerations
  • Proper sizing based on pipe OD
  • Load-bearing capacity and stress distribution
  • Corrosion resistance based on environment
  • Thermal expansion and contraction of pipes
  • Compliance with piping support standards (MSS / ASME)